ASUS ROG Strix XG309CM vs BenQ RD280U
Side-by-side comparison of viewing distance, PPI, and specifications
Category Ranking
Pixel Density (PPI)67in category
ASUS ROG Strix XG309CM94 PPI #65
BenQ RD280U164 PPI #18
93 PPI224 PPI
HDR Peak Brightness67in category
ASUS ROG Strix XG309CM300 nits #65
BenQ RD280U400 nits #51
250 nits2000 nits
DCI-P3 Color Gamut
BenQ RD280U93% #59
79%100%
Refresh Rate
ASUS ROG Strix XG309CM220 Hz
BenQ RD280U60 Hz
StandardHighUltra
Summary
- Sharpness: advantage BenQ RD280U — At 65cm, the BenQ RD280U is retina (164 PPI) while the ASUS ROG Strix XG309CM is not — you need to sit at least 93cm away for pixel-free viewing.
- Brightness: advantage BenQ RD280U — Similar SDR brightness (300 vs 350 nits), but the BenQ RD280U leads in HDR peak (400 vs 300 nits).
Key Differences
| Specification | ASUS ROG Strix XG309CM | BenQ RD280U |
|---|---|---|
| Screen Size | 29.5" | 28.2" |
| Refresh Rate | 220 Hz | 60 Hz |
| Response Time | 1 ms GTG | 5 ms GTG |
| Color Gamut | sRGB 110% | sRGB 100% · DCI-P3 93% · Adobe RGB 87% |
| Resolution | 2560×1080 | 3840×2560 |
| Pixel Density (PPI) | 94 | 164 |
| Optimal Viewing Distance | 93cm | 53cm |
| SDR Brightness | 300 nits | 350 nits |
| HDR Peak Brightness | 300 nits | 400 nits |
| Contrast Ratio | 1:1,000 | 1:1,200 |
| USB-C Power Delivery | 15 W | 90 W |
| Year | 2022 | 2024 |
All specifications
| Specification | ASUS ROG Strix XG309CM 2022 | BenQ RD280U 2024 |
|---|---|---|
| Screen Size | 29.5" (Better) | 28.2" |
| Resolution | 2560×1080 | 3840×2560 (Better) |
| Pixel Density (PPI) | 94 | 164 (Better) |
| Optimal Viewing Distance | 93cm | 53cm (Better) |
| Panel Type | IPS | IPS |
| Viewing Angle | 178° | 178° |
| Aspect Ratio | 21:9 | 3:2 |
| Refresh Rate | 220 Hz (Better) | 60 Hz |
| Variable Refresh Rate (VRR) | FreeSync Premium | None |
| Response Time | 1 ms GTG (Better) | 5 ms GTG |
| HDR Certification | None | DisplayHDR 400 |
| SDR Brightness | 300 nits | 350 nits (Better) |
| HDR Peak Brightness | 300 nits | 400 nits (Better) |
| Contrast Ratio | 1:1,000 | 1:1,200 (Better) |
| Ports | 1x HDMI · 1x DP · USB-C · USB Hub | 1x HDMI · 1x DP · USB-C · USB Hub |
| USB-C Power Delivery | 15 W | 90 W (Better) |
| Color Gamut | sRGB 110% (Better) | sRGB 100% · DCI-P3 93% · Adobe RGB 87% |
| Year | 2022 | 2024 (Better) |
Frequently Asked Questions
Which has better PPI: ASUS ROG Strix XG309CM or BenQ RD280U?
The BenQ RD280U has 164 PPI compared to 94 PPI for the ASUS ROG Strix XG309CM.
Which has a closer optimal viewing distance?
The BenQ RD280U requires 53cm vs 93cm for the ASUS ROG Strix XG309CM to reach retina quality.
Related Comparisons
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs ASUS ROG Strix XG309CM 2022 · 94 PPI · 29.5" · 220 Hz
Alienware AW2725DF 27" 2024 · 110 PPI · 26.7" · 360 Hz
vs BenQ RD280U 2024 · 164 PPI · 28.2" · 60 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs ASUS ROG Strix XG309CM 2022 · 94 PPI · 29.5" · 220 Hz
Alienware AW3225QF 32" 2024 · 139 PPI · 31.6" · 240 Hz
vs BenQ RD280U 2024 · 164 PPI · 28.2" · 60 Hz
Methodology & Sources
Formula: Retina distance (cm) = 3438 / PPI. Displayed values are rounded for readability.
Sources: Official manufacturer spec sheets and product pages. Specs are normalized before comparisons.
Comparison winners are calculated metric by metric (higher is better for most specs; lower is better for distance/response time).
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